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                生物城水世界
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    <!-- 📚 知识库主内容 -->
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                        <h1 class="display-4 text-primary-gradient mb-3">📚 知识库</h1>
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                            探索水的奥秘，了解环保知识，成为水资源保护小卫士！
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        <!-- 🌍 水资源知识 -->
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                        <h2 class="text-center mb-5">🌍 水资源知识</h2>
                        
                        <div class="knowledge-card" data-aos="fade-up" data-aos-delay="150">
                            <h4 class="text-primary mb-4">
                                <i class="bi bi-droplet me-2"></i>地球上的水资源
                            </h4>
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                                    <p class="lead">
                                        地球表面约71%被水覆盖，但可供人类直接使用的淡水资源仅占<strong class="text-danger">2.5%</strong>！
                                    </p>
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                                            <h6>💧 水资源分布：</h6>
                                            <ul class="list-unstyled">
                                                <li><i class="bi bi-ocean text-primary me-2"></i>海洋水：97.5%</li>
                                                <li><i class="bi bi-snow text-info me-2"></i>冰川冰盖：1.74%</li>
                                                <li><i class="bi bi-droplet text-success me-2"></i>地下水：0.76%</li>
                                                <li><i class="bi bi-water text-warning me-2"></i>地表淡水：0.01%</li>
                                            </ul>
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                                            <h6>⚠️ 面临的挑战：</h6>
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                                                <li><i class="bi bi-exclamation-triangle text-danger me-2"></i>水资源短缺</li>
                                                <li><i class="bi bi-exclamation-triangle text-danger me-2"></i>水污染严重</li>
                                                <li><i class="bi bi-exclamation-triangle text-danger me-2"></i>分布不均</li>
                                                <li><i class="bi bi-exclamation-triangle text-danger me-2"></i>浪费严重</li>
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                                    <img src="https://trae-api-us.mchost.guru/api/ide/v1/text_to_image?prompt=Earth%20with%20water%20distribution%20chart%2C%20showing%20ocean%2C%20glaciers%2C%20groundwater%2C%20and%20fresh%20water%2C%20educational%20infographic%2C%20colorful%20and%20child-friendly&image_size=square" 
                                         class="img-fluid rounded" alt="地球水资源分布">
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                        <div class="knowledge-card" data-aos="fade-up" data-aos-delay="200">
                            <h4 class="text-info mb-4">
                                <i class="bi bi-arrow-repeat me-2"></i>水循环过程
                            </h4>
                            <div class="row">
                                <div class="col-md-4">
                                    <img src="https://trae-api-us.mchost.guru/api/ide/v1/text_to_image?prompt=Water%20cycle%20diagram%20showing%20evaporation%2C%20condensation%2C%20precipitation%2C%20and%20collection%2C%20educational%20illustration%2C%20bright%20colors%2C%20child-friendly%20design&image_size=square" 
                                         class="img-fluid rounded mb-3" alt="水循环过程">
                                </div>
                                <div class="col-md-8">
                                    <p class="mb-4">
                                        水循环是地球上水分不断运动和转换的自然过程，就像大自然的"血液循环系统"。
                                    </p>
                                    <div class="row">
                                        <div class="col-sm-6">
                                            <div class="process-step">
                                                <h6><i class="bi bi-sun text-warning me-2"></i>1. 蒸发</h6>
                                                <p class="small text-muted mb-0">太阳加热使水变成水蒸气上升到空中</p>
                                            </div>
                                            <div class="process-step">
                                                <h6><i class="bi bi-cloud text-info me-2"></i>2. 凝结</h6>
                                                <p class="small text-muted mb-0">水蒸气遇冷凝结成小水滴形成云朵</p>
                                            </div>
                                            <div class="process-step">
                                                <h6><i class="bi bi-cloud-rain text-primary me-2"></i>3. 降水</h6>
                                                <p class="small text-muted mb-0">云中的水滴变大后以雨、雪等形式降落</p>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="process-step">
                                                <h6><i class="bi bi-arrow-down text-success me-2"></i>4. 径流</h6>
                                                <p class="small text-muted mb-0">降水形成地表径流汇入河流湖泊</p>
                                            </div>
                                            <div class="process-step">
                                                <h6><i class="bi bi-arrow-down-circle text-warning me-2"></i>5. 渗透</h6>
                                                <p class="small text-muted mb-0">部分水渗入地下成为地下水</p>
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                                            <div class="process-step">
                                                <h6><i class="bi bi-arrow-return-left text-info me-2"></i>6. 回流</h6>
                                                <p class="small text-muted mb-0">水最终流回海洋，循环重新开始</p>
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        <!-- 🏭 污水处理知识 -->
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                        <h2 class="text-center mb-5">🏭 污水处理知识</h2>
                        
                        <div class="knowledge-card" data-aos="fade-up" data-aos-delay="300">
                            <h4 class="text-success mb-4">
                                <i class="bi bi-recycle me-2"></i>为什么要处理污水？
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                                        <h6><i class="bi bi-exclamation-triangle me-2"></i>不处理污水的危害：</h6>
                                        <ul class="mb-0">
                                            <li>污染河流湖泊，破坏生态环境</li>
                                            <li>传播疾病，危害人体健康</li>
                                            <li>影响饮用水安全</li>
                                            <li>破坏水生生物栖息地</li>
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                                        <h6><i class="bi bi-check-circle me-2"></i>处理污水的好处：</h6>
                                        <ul class="mb-0">
                                            <li>保护水环境，维护生态平衡</li>
                                            <li>保障人民健康</li>
                                            <li>实现水资源循环利用</li>
                                            <li>促进可持续发展</li>
                                        </ul>
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                        <div class="knowledge-card" data-aos="fade-up" data-aos-delay="350">
                            <h4 class="text-warning mb-4">
                                <i class="bi bi-gear me-2"></i>污水处理全流程
                            </h4>
                            <div class="row">
                                <div class="col-12">
                                    <div class="d-flex flex-wrap justify-content-center mb-4">
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-funnel display-6 text-primary"></i>
                                                <h6 class="mt-2">粗格栅</h6>
                                                <p class="small text-muted mb-0">去除大垃圾</p>
                                            </div>
                                        </div>
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-grid-3x3 display-6 text-info"></i>
                                                <h6 class="mt-2">细格栅</h6>
                                                <p class="small text-muted mb-0">去除小杂质</p>
                                            </div>
                                        </div>
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-layer-backward display-6 text-success"></i>
                                                <h6 class="mt-2">沉砂池</h6>
                                                <p class="small text-muted mb-0">沉淀砂粒</p>
                                            </div>
                                        </div>
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-bug display-6 text-warning"></i>
                                                <h6 class="mt-2">生物池</h6>
                                                <p class="small text-muted mb-0">微生物处理</p>
                                            </div>
                                        </div>
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-circle display-6 text-secondary"></i>
                                                <h6 class="mt-2">二沉池</h6>
                                                <p class="small text-muted mb-0">二次沉淀</p>
                                            </div>
                                        </div>
                                        <div class="process-step mx-2 mb-2" style="min-width: 150px;">
                                            <div class="text-center">
                                                <i class="bi bi-droplet display-6 text-danger"></i>
                                                <h6 class="mt-2">消毒池</h6>
                                                <p class="small text-muted mb-0">杀菌消毒</p>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div class="row">
                                <div class="col-md-4">
                                    <img src="https://trae-api-us.mchost.guru/api/ide/v1/text_to_image?prompt=Water%20treatment%20plant%20process%20diagram%2C%20showing%20different%20treatment%20stages%2C%20educational%20illustration%2C%20colorful%20and%20clear%2C%20child-friendly%20design&image_size=landscape_4_3" 
                                         class="img-fluid rounded" alt="污水处理流程">
                                </div>
                                <div class="col-md-8">
                                    <div class="row">
                                        <div class="col-sm-6">
                                            <div class="card border-0 bg-light mb-3">
                                                <div class="card-body">
                                                    <h6 class="text-primary">
                                                        <i class="bi bi-funnel me-2"></i>物理处理
                                                    </h6>
                                                    <p class="small mb-2"><strong>粗格栅：</strong>像大筛子一样，拦住塑料袋、树枝等大垃圾</p>
                                                    <p class="small mb-2"><strong>细格栅：</strong>更密的筛子，去除小树叶、纸屑等</p>
                                                    <p class="small mb-0"><strong>沉砂池：</strong>让砂粒沉淀到底部</p>
                                                </div>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="card border-0 bg-light mb-3">
                                                <div class="card-body">
                                                    <h6 class="text-success">
                                                        <i class="bi bi-bug me-2"></i>生物处理
                                                    </h6>
                                                    <p class="small mb-2"><strong>生物池：</strong>培养好细菌，吃掉脏东西</p>
                                                    <p class="small mb-2"><strong>二沉池：</strong>让细菌和处理后的水分离</p>
                                                    <p class="small mb-0">就像小虫子吃垃圾一样神奇！</p>
                                                </div>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="card border-0 bg-light mb-3">
                                                <div class="card-body">
                                                    <h6 class="text-warning">
                                                        <i class="bi bi-shield me-2"></i>化学处理
                                                    </h6>
                                                    <p class="small mb-2"><strong>消毒池：</strong>用氯气或紫外线杀死细菌</p>
                                                    <p class="small mb-2"><strong>调节池：</strong>调节水的酸碱度</p>
                                                    <p class="small mb-0">确保处理后的水安全无害</p>
                                                </div>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="card border-0 bg-light mb-3">
                                                <div class="card-body">
                                                    <h6 class="text-info">
                                                        <i class="bi bi-check-circle me-2"></i>最终效果
                                                    </h6>
                                                    <p class="small mb-2">处理后的水变得清澈透明</p>
                                                    <p class="small mb-2">有害物质被去除</p>
                                                    <p class="small mb-0">可以安全排放或循环利用</p>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </section>

        <!-- 💡 环保小贴士 -->
        <section class="py-5">
            <div class="container">
                <div class="row">
                    <div class="col-12" data-aos="fade-up" data-aos-delay="400">
                        <h2 class="text-center mb-5">💡 环保小贴士</h2>
                        
                        <div class="row g-4">
                            <div class="col-md-4">
                                <div class="card border-0 shadow-custom h-100">
                                    <div class="card-body text-center p-4">
                                        <i class="bi bi-droplet display-4 text-primary mb-3"></i>
                                        <h5 class="card-title">节约用水</h5>
                                        <ul class="list-unstyled text-start">
                                            <li><i class="bi bi-check text-success me-2"></i>洗手时关水龙头</li>
                                            <li><i class="bi bi-check text-success me-2"></i>洗澡时间不要太长</li>
                                            <li><i class="bi bi-check text-success me-2"></i>收集雨水浇花</li>
                                            <li><i class="bi bi-check text-success me-2"></i>修理漏水的水龙头</li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-4">
                                <div class="card border-0 shadow-custom h-100">
                                    <div class="card-body text-center p-4">
                                        <i class="bi bi-recycle display-4 text-success mb-3"></i>
                                        <h5 class="card-title">减少污染</h5>
                                        <ul class="list-unstyled text-start">
                                            <li><i class="bi bi-check text-success me-2"></i>不乱扔垃圾</li>
                                            <li><i class="bi bi-check text-success me-2"></i>少用化学清洁剂</li>
                                            <li><i class="bi bi-check text-success me-2"></i>垃圾分类投放</li>
                                            <li><i class="bi bi-check text-success me-2"></i>不向河道排污</li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-4">
                                <div class="card border-0 shadow-custom h-100">
                                    <div class="card-body text-center p-4">
                                        <i class="bi bi-lightbulb display-4 text-warning mb-3"></i>
                                        <h5 class="card-title">宣传倡导</h5>
                                        <ul class="list-unstyled text-start">
                                            <li><i class="bi bi-check text-success me-2"></i>向家人宣传环保</li>
                                            <li><i class="bi bi-check text-success me-2"></i>参与环保活动</li>
                                            <li><i class="bi bi-check text-success me-2"></i>监督污染行为</li>
                                            <li><i class="bi bi-check text-success me-2"></i>学习环保知识</li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </section>

        <!-- 🎯 知识问答 -->
        <section class="py-5 bg-light">
            <div class="container">
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                    <div class="col-lg-10 mx-auto" data-aos="fade-up" data-aos-delay="450">
                        <h2 class="text-center mb-5">🎯 知识问答</h2>
                        
                        <div class="accordion" id="knowledgeQuiz">
                            <div class="accordion-item mb-3">
                                <h2 class="accordion-header">
                                    <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#question1">
                                        <i class="bi bi-question-circle text-primary me-2"></i>
                                        地球上淡水占总水量的多少？
                                    </button>
                                </h2>
                                <div id="question1" class="accordion-collapse collapse show" data-bs-parent="#knowledgeQuiz">
                                    <div class="accordion-body">
                                        <p><strong>答案：约2.5%</strong></p>
                                        <p>虽然地球表面71%被水覆盖，但其中97.5%是咸咸的海水，淡水只占2.5%。而在这2.5%的淡水中，大部分被锁在冰川和冰盖中，真正可供人类直接使用的淡水资源还不到1%！</p>
                                    </div>
                                </div>
                            </div>
                            
                            <div class="accordion-item mb-3">
                                <h2 class="accordion-header">
                                    <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#question2">
                                        <i class="bi bi-question-circle text-info me-2"></i>
                                        污水处理后能达到什么效果？
                                    </button>
                                </h2>
                                <div id="question2" class="accordion-collapse collapse" data-bs-parent="#knowledgeQuiz">
                                    <div class="accordion-body">
                                        <p><strong>答案：处理后的水可以达到国家排放标准，变得清澈透明，有害物质被去除。</strong></p>
                                        <p>经过处理的污水可以：</p>
                                        <ul>
                                            <li>安全排放到河流湖泊中，不会污染环境</li>
                                            <li>用于农业灌溉</li>
                                            <li>工业循环使用</li>
                                            <li>经过深度处理后甚至可以作为饮用水</li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                            
                            <div class="accordion-item mb-3">
                                <h2 class="accordion-header">
                                    <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#question3">
                                        <i class="bi bi-question-circle text-success me-2"></i>
                                        我们日常生活中如何保护水资源？
                                    </button>
                                </h2>
                                <div id="question3" class="accordion-collapse collapse" data-bs-parent="#knowledgeQuiz">
                                    <div class="accordion-body">
                                        <p><strong>答案：从节约用水和减少污染两方面入手。</strong></p>
                                        <div class="row">
                                            <div class="col-sm-6">
                                                <h6>💧 节约用水：</h6>
                                                <ul>
                                                    <li>洗手、刷牙时及时关闭水龙头</li>
                                                    <li>洗澡时间控制在10分钟以内</li>
                                                    <li>收集洗菜水浇花</li>
                                                    <li>修理漏水的水龙头</li>
                                                </ul>
                                            </div>
                                            <div class="col-sm-6">
                                                <h6>🛡️ 减少污染：</h6>
                                                <ul>
                                                    <li>不向河道乱扔垃圾</li>
                                                    <li>少用含磷洗衣粉</li>
                                                    <li>正确处理废电池等有害垃圾</li>
                                                    <li>监督举报污染行为</li>
                                                </ul>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                            
                            <div class="accordion-item mb-3">
                                <h2 class="accordion-header">
                                    <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#question4">
                                        <i class="bi bi-question-circle text-warning me-2"></i>
                                        生物处理中的"好细菌"是如何工作的？
                                    </button>
                                </h2>
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                                        <p><strong>答案：好细菌以污水中的有机污染物为食物，将它们分解成无害的物质。</strong></p>
                                        <p>这些微生物就像小小的"清洁工"：</p>
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                                            <li>它们"吃"掉污水中的脏东西</li>
                                            <li>将复杂的有机物分解成简单的无机物</li>
                                            <li>产生二氧化碳和水等无害物质</li>
                                            <li>有些细菌还能去除污水中的氮和磷</li>
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                                        <p>这就像是自然界的食物链，微生物在维持生态平衡中发挥重要作用！</p>
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